Optimised rough sets for modelling interstate conflict

Bodie Crossingham, Tshilidzi Marwala, Monica Lagazio

Research output: Contribution to journalConference articlepeer-review

18 Citations (Scopus)


Rough set theory is technique that deals with the formal approximation of crisp sets thereby modeling vagueness and uncertainty. This paper presents an approach to optimize rough set partition sizes using various optimization techniques for interstate conflict. The four optimization techniques used are genetic algorithm, particle swarm optimization, hill climbing and simulated annealing. The results obtained from this granulization method are compared to static granulisation methods, namely, equal-width-bin and equal-frequency-bin partitioning. The results show that all of the proposed optimised methods produce higher forecasting accuracies than that of the two static methods and that genetic algorithm approach produced the highest accuracy. The rules generated from the rough set are linguistic and easy-to-interpret, but this does come at the expense of the accuracy lost in the discretisation process where the granularity of the variables is decreased.

Original languageEnglish
Article number4811445
Pages (from-to)1198-1204
Number of pages7
JournalConference Proceedings - IEEE International Conference on Systems, Man and Cybernetics
Publication statusPublished - 2008
Externally publishedYes
Event2008 IEEE International Conference on Systems, Man and Cybernetics, SMC 2008 - Singapore, Singapore
Duration: 12 Oct 200815 Oct 2008


  • Granulisation
  • Miltarised interste disputes
  • Optimisation techniques
  • Rough set theory

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Control and Systems Engineering
  • Human-Computer Interaction


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